Mercurial > dovecot > original-hg > dovecot-1.2
annotate src/lib/mempool-system-clean.c @ 9532:00cd9aacd03c HEAD
Updated copyright notices to include year 2010.
author | Timo Sirainen <tss@iki.fi> |
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date | Mon, 25 Jan 2010 01:18:58 +0200 |
parents | d6fcb6d050ba |
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rev | line source |
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9532
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Updated copyright notices to include year 2010.
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1 /* Copyright (c) 2007-2010 Dovecot authors, see the included COPYING file */ |
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2 |
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3 /* @UNSAFE: whole file */ |
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4 |
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5 #include "lib.h" |
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6 #include "safe-memset.h" |
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7 #include "mempool.h" |
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8 |
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9 #include <stdlib.h> |
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10 #ifndef HAVE_MALLOC_USABLE_SIZE |
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11 /* no extra includes needed */ |
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12 #elif defined (HAVE_MALLOC_NP_H) |
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13 # include <malloc_np.h> /* FreeBSD */ |
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14 #elif defined (HAVE_MALLOC_H) |
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15 # include <malloc.h> /* Linux */ |
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16 #endif |
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17 |
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18 #ifdef HAVE_GC_GC_H |
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19 # include <gc/gc.h> |
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20 #elif defined (HAVE_GC_H) |
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21 # include <gc.h> |
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22 #endif |
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23 |
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24 /* use the maximum of required memory alignment and sizeof(void *) |
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25 (sizeof(size_t) is assumed to be same. it always is.) */ |
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26 #if MEM_ALIGN_SIZE > SIZEOF_VOID_P |
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27 # define EXTRA_SIZE_SPACE MEM_ALIGN_SIZE |
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28 #else |
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29 # define EXTRA_SIZE_SPACE SIZEOF_VOID_P |
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30 #endif |
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32 /* FIXME: Disabled for now, broken with Valgrind and HP-UX. */ |
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33 #undef HAVE_MALLOC_USABLE_SIZE |
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34 |
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35 static const char *pool_system_clean_get_name(pool_t pool); |
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36 static void pool_system_clean_ref(pool_t pool); |
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37 static void pool_system_clean_unref(pool_t *pool); |
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38 static void *pool_system_clean_malloc(pool_t pool, size_t size); |
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39 static void pool_system_clean_free(pool_t pool, void *mem); |
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40 static void *pool_system_clean_realloc(pool_t pool, void *mem, |
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41 size_t old_size, size_t new_size); |
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42 static void pool_system_clean_clear(pool_t pool); |
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43 static size_t pool_system_clean_get_max_easy_alloc_size(pool_t pool); |
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44 |
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45 static struct pool_vfuncs static_system_clean_pool_vfuncs = { |
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46 pool_system_clean_get_name, |
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47 |
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48 pool_system_clean_ref, |
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49 pool_system_clean_unref, |
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50 |
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51 pool_system_clean_malloc, |
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52 pool_system_clean_free, |
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53 |
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54 pool_system_clean_realloc, |
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55 |
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56 pool_system_clean_clear, |
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57 pool_system_clean_get_max_easy_alloc_size |
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58 }; |
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59 |
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60 static struct pool static_system_clean_pool = { |
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61 MEMBER(v) &static_system_clean_pool_vfuncs, |
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62 |
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63 MEMBER(alloconly_pool) FALSE, |
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64 MEMBER(datastack_pool) FALSE |
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65 }; |
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66 |
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67 pool_t system_clean_pool = &static_system_clean_pool; |
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68 |
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69 static const char *pool_system_clean_get_name(pool_t pool ATTR_UNUSED) |
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70 { |
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71 return "system clean"; |
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72 } |
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73 |
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74 static void pool_system_clean_ref(pool_t pool ATTR_UNUSED) |
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75 { |
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76 } |
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77 |
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78 static void pool_system_clean_unref(pool_t *pool ATTR_UNUSED) |
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79 { |
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80 } |
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81 |
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82 static size_t mem_get_size(void *mem) |
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83 { |
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84 #ifdef USE_GC |
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85 return GC_size(mem); |
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86 #elif defined(HAVE_MALLOC_USABLE_SIZE) |
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87 return malloc_usable_size(mem); |
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88 #else |
5377 | 89 return *((size_t *)PTR_OFFSET(mem, -EXTRA_SIZE_SPACE)); |
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90 #endif |
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91 } |
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92 |
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93 static void *pool_system_clean_malloc(pool_t pool ATTR_UNUSED, size_t size) |
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94 { |
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95 void *mem; |
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96 |
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97 if (unlikely(size == 0 || size > SSIZE_T_MAX)) |
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98 i_panic("Trying to allocate %"PRIuSIZE_T" bytes", size); |
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99 |
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100 #ifdef USE_GC |
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101 mem = GC_malloc(size); |
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102 #else |
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103 #ifndef HAVE_MALLOC_USABLE_SIZE |
5377 | 104 size += EXTRA_SIZE_SPACE; |
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105 #endif |
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106 mem = calloc(size, 1); |
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107 #endif |
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108 if (unlikely(mem == NULL)) { |
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109 i_fatal_status(FATAL_OUTOFMEM, "pool_system_malloc(%"PRIuSIZE_T |
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110 "): Out of memory", size); |
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111 } |
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112 #if !defined(USE_GC) && !defined(HAVE_MALLOC_USABLE_SIZE) |
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113 { |
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114 size_t *saved_size = mem; |
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115 |
5377 | 116 *saved_size = size - EXTRA_SIZE_SPACE; |
117 mem = PTR_OFFSET(mem, EXTRA_SIZE_SPACE); | |
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118 } |
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119 #endif |
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120 return mem; |
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121 } |
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122 |
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123 static void pool_system_clean_free(pool_t pool ATTR_UNUSED, void *mem) |
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124 { |
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125 if (mem != NULL) { |
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126 safe_memset(mem, 0, mem_get_size(mem)); |
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127 #ifndef USE_GC |
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128 #ifndef HAVE_MALLOC_USABLE_SIZE |
5377 | 129 mem = PTR_OFFSET(mem, -EXTRA_SIZE_SPACE); |
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130 #endif |
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131 free(mem); |
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132 #endif |
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133 } |
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134 } |
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135 |
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136 static void *pool_system_clean_realloc(pool_t pool ATTR_UNUSED, void *mem, |
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137 size_t old_size, size_t new_size) |
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138 { |
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139 void *new_mem; |
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140 size_t old_alloc_size; |
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141 |
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142 if (unlikely(new_size == 0 || new_size > SSIZE_T_MAX)) |
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143 i_panic("Trying to allocate %"PRIuSIZE_T" bytes", new_size); |
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144 |
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145 new_mem = pool_system_clean_malloc(pool, new_size); |
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146 if (mem != NULL) { |
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147 #if !defined(USE_GC) && defined(HAVE_MALLOC_USABLE_SIZE) |
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148 i_assert(old_size == (size_t)-1 || |
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149 old_size <= malloc_usable_size(mem)); |
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150 #endif |
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151 old_alloc_size = mem_get_size(mem); |
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152 memcpy(new_mem, mem, I_MIN(old_alloc_size, new_size)); |
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153 |
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154 if (old_size < new_size) { |
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155 /* clear new data */ |
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156 memset((char *)new_mem + old_size, 0, |
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157 new_size - old_size); |
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158 } |
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159 pool_system_clean_free(pool, mem); |
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160 } |
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161 |
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162 return new_mem; |
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163 } |
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164 |
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165 static void ATTR_NORETURN |
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166 pool_system_clean_clear(pool_t pool ATTR_UNUSED) |
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167 { |
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168 i_panic("pool_system_clean_clear() must not be called"); |
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169 } |
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170 |
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171 static size_t |
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172 pool_system_clean_get_max_easy_alloc_size(pool_t pool ATTR_UNUSED) |
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173 { |
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174 return 0; |
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175 } |